CN1382553A

CN1382553A - Multi-edge tool bit

Info

Publication number: CN1382553A
Application number: CN02104996A
Authority: CN
Inventors: 下村博; 池永幸一; 堀池伸和; 北嶋纯
Original assignee: Mitsubishi Materials Corp
Current assignee: Mitsubishi Materials Corp
Priority date: 2001-04-26
Filing date: 2002-03-29
Publication date: 2002-12-04
Also published as: KR20020083423A; EP1252955A8; EP1252955A1; US20020159846A1

Abstract

The present invention provides an indexable insert which can pare away the chip stably without increase of cutting resistance. With this insert, serrations are formed by arranging a plurality of groove portions and ridge portions alternatingly upon side ridge edge portions of the upper surface, with the exception of sloping surfaces which are formed at both end portions in the longitudinal directions of the upper surface. As a result, the cutting edges exhibit wavy shapes which are made up from this plurality of groove portions and ridge portions over the sloping surface, with the exception of these sloping surfaces. Furthermore, the groove portions and the ridge portions of the serrations are made as curved surfaces. This insert is fitted to a tool main body so that the groove portions and the ridge portions of the serrations extend perpendicular to the rotational axis of the tool.

Description

Throw-away tip

Technical field

The present invention relates to be installed in the throw-away tip (hereinafter referred to as blade) of more remodeling on ball end mill etc.

Background technology

In the ball end mill of more remodeling, for example, roughly becoming on the columniform cutter hub front end, a pair of chip pocket forms on the opposition side with clamping rotary tool axis.Blade respectively by pinching screw can be installed in with freely loading and unloading onwards form in blade mount pad on the wall along the cutter rotation direction of these chip pockets on.

The blade that is contained on the blade mount pad is so to be provided with, and promptly makes the cutting edge that roughly is 1/4 circular arc be projected into cutter hub outer peripheral face rotary motion trace outer and cutting edge respectively and roughly is spherical shape.In such ball end mill of more remodeling, cut with its whole cutting edge usually.In addition, in order to make the smear metal that produces by cutting be cut off very brokenly and to keep good chip removal performance, on cutting edge, be provided with the otch that is called as indentation.

But, under the occasion that with the inclination angle of more remodel ball end mill such as its relative rotary tool axis of machining is various workpiece inequality with said structure, in other words, when on various cutting directions, carrying out machining, be not whole cutting edge, but the part cutting edge is used for cutting.Under such occasion,, then can not cut off smear metal very brokenly if indentation forms on the part that is not used to cut of cutting edge.

And, owing on cutting edge, offered indentation, so the cutting resistance when having increased cutting also also exists the problem that the cutting edge sharpness reduces.

Formulated the present invention in view of the above problems, the purpose of this invention is to provide a kind of cutting resistance that do not increase and just can stablize the throw-away tip that cuts off smear metal.

Summary of the invention

For addressing the above problem and reaching such purpose, characteristics of the present invention are, be installed in the crest line portion of the end face relative with the bottom surface that becomes seating surface in the throw-away tip that forms on the cutter hub of a part that cutting edge and rotary motion trace cutting edge that roughly is circular arc roughly is sphere a kind of, described cutting edge is in wave shape.

Blade in wave shape is for example alternately arranged the serration that forms or form a plurality of somes portions of intersecting with cutting edge on end face and obtain by form a plurality of grooves and projection on end face or side.

In this structure, the waveform cutting edge in the crest line portion cuts off smear metal between end face and the side by forming in.Therefore, in its whole length range under the situation in wave shape, when carrying out machining on various cutting directions, even if the cutting edge that is used to a cut part just, this part cutting edge is also in wave shape certainly at cutting edge.As a result, can stably cut off smear metal.

In addition, forming under the situation of cutting edge in wave shape,, then do not resembling and increase cutting resistance the indentation if be parallel to bottom surface landform grooving by above-mentioned serration.Perhaps, be toward or away from bottom surface ground along with leaving cutting edge, can suitably give the cutting edge that forms in the end face crest line portion according to the cutting situation with setting with positive rake angle or negative rake by making groove and projection.

And, forming under the occasion of cutting edge in wave shape by the some portion on the end face, make the end face that links to each other with the groove of cutting edge be parallel to the bottom surface or tilt near bottom surface ground along with leaving cutting edge, do not increase cutting resistance thereby resemble the indentation.In addition, because by the projection of some portion formation cutting edge, so, make under the situation about tilting near ground, bottom surface along with leaving cutting edge with the surface of the protruding some portion that links to each other of cutting edge, can on the cutting edge projection, set positive rake angle, can guarantee the sharpness of cutting edge thus well.

In addition, characteristics of the present invention are, so form described serration, promptly described groove and projection along with trend cutter hub front near the cutter hub outer circumferential side, perhaps extend on perpendicular to the direction of cutter pivot center and relatively the cutter pivot center in 30 ° of-90 ° of scopes, tilt.

If described groove is too small with the inclination angle of the relative cutter pivot center of bearing of trend of projection, then cutting edge is very mild waveform in the part of cutter hub rear end side, thus one, probably can't cut off smear metal with the cutting edge of cutter hub rear end side.On the other hand, if the inclination angle of cutter pivot center is excessive relatively, then cutting edge is very mild waveform in the part of cutter hub front, thereby probably can't cut off smear metal with the cutting edge of cutter hub front.

Therefore, in the present invention, described groove is set to 30 °-90 ° with the inclination angle of the relative cutter pivot center of bearing of trend of projection.As a result, can in the length range of whole cutting edge, keep suitable waveform shape, when promptly box lunch carries out machining on various directions, utilize the smear metal cut-out effect of cutting edge in wave shape also not have to reduce and can stably cut off smear metal.

In addition, characteristics of the present invention are that described groove and projection are made of curved surface.

According to this structure,, thereby guaranteed the intensity of cutting edge because the cutting edge that forms in the end face of blade and the crest line portion between the side also becomes the waveform that is made of curve.

In addition, characteristics of the present invention are, when on cross section, seeing described groove and projection perpendicular to its bearing of trend, between bottom land and the protruding summit and the distance on the throw-away tip thickness direction be set to 0.3 millimeter-3.0 millimeters.

If the distance between bottom land and the protruding summit is too small, then form in cutting edge in the described crest line portion shape that roughly is in line, probably can't cut off smear metal with the waveform cutting edge.On the other hand, if be the very big waveform of high low head, then probably reduced the intensity of cutting edge.

Therefore, in the present invention, the distance between bottom land and the protruding summit is set to 0.3 millimeter-3.0 millimeters.As a result, reduce the effect of utilizing cutting edge in wave shape to cut off smear metal and also can stably cut off smear metal.

In addition, characteristics of the present invention are that when seeing described groove and projection on the cross section perpendicular to its bearing of trend, the distance between the protruding summit is set to 1.0 millimeters-10.0 millimeters.

If the distance between the protruding summit is too small, the cutting edge that then forms in the described crest line portion is very fine and closely woven waveform shape, and on the other hand, if the distance between the protruding summit is excessive, the cutting edge that forms in the described crest line portion is very mild waveform.As a result, in either case, all probably can not cut off smear metal.

Therefore, in the present invention, distance is set to 1.0 millimeters-10.0 millimeters between the protruding summit.As a result, reduction utilizes cutting edge in wave shape to cut off the effect of smear metal and can stably cut off smear metal.

In addition, the invention is characterized in, when on cross section, seeing described groove and when projection perpendicular to its bearing of trend, described groove and raise into its radius of curvature and be set to 1.0 millimeters-10.0 millimeters shape.

If it is too small to form the radius of curvature of slot cross-section and convex cross section, then groove and projection are sharp excessively, and the cutting edge that forms in the described crest line portion also is same waveform shape, and the result probably can't guarantee the intensity of cutting edge.On the other hand, if this radius of curvature is excessive, groove and raise into very mild curve shape then, the result, the cutting edge that forms in the described crest line portion also is very mild shape, probably can't cut off smear metal.

Therefore, in the present invention, it is 1.0 millimeters-10.0 millimeters curve-like that described projection and groove are made into its radius of curvature.As a result, guaranteed the intensity of cutting edge and can guarantee that excellent chip cuts off effect.

In addition, characteristics of the present invention are, when seeing described groove and projection (being cutting edge) on the cross section perpendicular to its bearing of trend, the absolute value at the inclination angle that the described relatively bottom surface of tangent line of the intersection between the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the groove adjacent with the cutter hub front forms and described projection and the groove adjacent with the cutter hub rear end side forms is inequality.

According to this structure, can be designed to ideal form to described waveform cutting edge and can obtain to have the cutting edge of various characteristics according to the cutting situation.

At this moment; If the absolute value at the inclination angle that the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between cutting edge projection and the groove adjacent with the cutter hub front forms forms greater than the relatively described bottom surface of tangent line of the intersection between described projection and the groove adjacent with the cutter hub rear end side, then the length that namely when blade is installed on the cutter hub, has a cutting edge of negative axial rake of the part between cutting edge projection and the groove adjacent with the cutter hub front dwindle and cutting edge projection and the groove adjacent with the cutter hub rear end side between the part length that when blade is installed on the cutter hub, has a cutting edge of positive axial rake increase. The sharpness that can keep as a result, cutting edge well.

In addition, characteristics of the present invention are that the intersection between groove and the projection is made of straight line.

In addition, characteristics of the present invention are, the end face that links to each other with the cutting edge fore-end is made into to move closer to along with trend cutting edge front end the inclined-plane of bottom surface, and described serration forms on the end face except that this inclined-plane.

When such formation, can reduce the nose angle that the cutting edge front end of high cutting load is born in peripheral speed and increase.And, owing on end face, formed serration or some portion because of the blade section of this inclined-plane attenuate, thereby do not reduce the blade rigidity.

On the other hand, characteristics of the present invention are that promptly when relatively seeing the serration that forms on this side with described side, groove is extending on the relative direction that tilts perpendicular to the direction of end face with the absolute value below 10 ° with projection.

According to this structure, when blade is installed on the cutter hub, groove and the projection can be configured to along with the roughly the same direction of cutter rotation direction on extend.As a result, when carrying out machining, can give the serration groove reliably avoiding the possibility of workpiece, not increase cutting resistance the indentation in the past thereby resemble.

According to this structure, the groove and the projection that form in the serration on the side intersect with cutting edge, and the result can form the waveform of cutting edge reliably.In addition, owing on another side, do not form serration, thereby do not reduce the blade rigidity.In addition, the bottom surface of seating surface does not have and groove and protruding intersecting owing to become, so do not influence the support property of blade yet.

Description of drawings

Fig. 1 is the oblique view of the blade of first embodiment of the invention.

Fig. 2 is the vertical view of the blade of first embodiment of the invention.

Fig. 3 is the view of the blade of first embodiment of the invention along the arrow A direction.

Fig. 4 is the view of the blade of first embodiment of the invention along the arrow B direction.

Fig. 5 illustrates the serration shape of the blade of first embodiment of the invention.

Fig. 6 A is the plane of the end mill(ing) cutter of more remodeling that the blade of first embodiment of the invention is housed.

Fig. 6 B shows the front end face of the end mill(ing) cutter of more remodeling of the blade that first embodiment of the invention is housed.

Fig. 7 is the side view of the ball end mill of more remodeling that the blade of first embodiment of the invention is housed.

Fig. 8 illustrates first variation of the blade serration of first embodiment of the invention.

Fig. 9 illustrates second variation of the blade serration of first embodiment of the invention.

Figure 10 is the oblique view of the blade of second embodiment of the invention.

Figure 11 is the vertical view of the blade of second embodiment of the invention.

Figure 12 is the plane of the ball end mill of more remodeling that the blade of second embodiment of the invention is housed.

Figure 13 is the oblique view of the blade of third embodiment of the invention.

Figure 14 is the vertical view of the blade of third embodiment of the invention.

Figure 15 is the view of the blade of third embodiment of the invention along the arrow A direction.

Figure 16 is the view of the blade of third embodiment of the invention along the arrow B direction.

Figure 17 A is the plane of the end mill(ing) cutter of more remodeling that the blade of third embodiment of the invention is housed.

Figure 17 B shows the front end face of the end mill(ing) cutter of more remodeling of the blade that third embodiment of the invention is housed.

Figure 18 is the side view of the ball end mill of more remodeling that the blade of third embodiment of the invention is housed.

Figure 19 is the oblique view of the blade of fourth embodiment of the invention.

Figure 20 is the oblique view of the blade of fifth embodiment of the invention.

The vertical view of the blade of Figure 21 fifth embodiment of the invention.

Figure 22 is the view of the blade of fifth embodiment of the invention along the arrow A direction.

Figure 23 is the view of the blade of fifth embodiment of the invention along the arrow B direction.

Figure 24 A is the plane of the ball end mill of more remodeling that the blade of fifth embodiment of the invention is housed.

Figure 24 B shows the front end face of the end mill(ing) cutter of more remodeling of the blade that fifth embodiment of the invention is housed.

Figure 25 is the side view of the ball end mill of more remodeling that the blade of fifth embodiment of the invention is housed.

Figure 26 is the oblique view of the blade of sixth embodiment of the invention.

The vertical view of the blade of Figure 27 sixth embodiment of the invention.

Figure 28 is the view of the blade of sixth embodiment of the invention along the arrow A direction.

Figure 29 is the view of the blade of sixth embodiment of the invention along the arrow B direction.

Figure 30 illustrates the shape of the blade serration of sixth embodiment of the invention.

Figure 31 A is the plane of the end mill(ing) cutter of more remodeling that the blade of sixth embodiment of the invention is housed.

Figure 31 B shows the front end face of the end mill(ing) cutter of more remodeling of the blade that sixth embodiment of the invention is housed.

Figure 32 is the side view of the ball end mill of more remodeling that the blade of sixth embodiment of the invention is housed.

Figure 33 illustrates first variation of the blade serration of sixth embodiment of the invention.

Figure 34 illustrates second variation of the blade serration of sixth embodiment of the invention.

The explanation of preferred implementation

Below, referring to accompanying drawing blade according to the embodiment of the invention is described.

Fig. 1 is the oblique view of the blade of first embodiment of the invention, and Fig. 2 is the vertical view of this blade, and Fig. 3 is the view of this blade along the arrow A direction, and Fig. 4 is the view of this blade along the arrow B direction, and Fig. 5 is the sectional view along this blade of C-C line.

Blade 10 is for example made by hard materials such as superhard alloys, as Fig. 1-shown in Figure 4, in plan view, it becomes roughly to become fusiform tabular, being provided with constituent ratio becomes the end face 12 of the forward face in the bottom surface 11 of the seating surface when being installed on the cutter hub, and the side 13 that becomes major flank is 11 outward-dipping gradually and formed positive blade face towards end face 12 from the bottom surface.And side 13 be by the first major flank 13A on blade 10 end faces 12 sides and blade 10 bottom surfaces 11 sides and constitute than the first major flank 13A, the second bigger major flank 13B that tilts.

On the central portion of blade 10, formed connect end face 12 and bottom surface 11 the aftermentioned pinching screw with through hole 19, on bottom surface 11, formed in the front and back of through hole 19 with blade 10 length directions intersect as two keyways 18,18.So form a pair of cutting edge 17 that roughly becomes 1/4 circular arc as shown in Figure 1, 2 in the end face 12 of blade 10 and the crest line portion between the bottom surface 13, promptly they are clamped through hole 19 ground and are positioned on the opposition side.A blade can so form these cutting edges 17 in enough twice ground, and promptly when seeing in plane, the center of their phase blade 10 becomes point symmetry structure.

Along on the two ends of the length direction of end face 12, two inclined-

plane

12A, 12A that tilt along with the front end corner part 17A that tends to each cutting edge 17 respectively and back vertex angle part 17B side and near 11 ground, blade 10 bottom surfaces have been formed.By on end face 12, forming inclined-

plane

12A, 12A, formed on the front end corner part 17A of a cutting edge 17 therein along with leaving bight 17 and to have increased the circular arc first cutting edge 17C that the spacing ground with bottom surface 11 tilts, simultaneously, on the vertex angle part 17B of back, formed and increased the second cutting edge 17D that the spacing ground with bottom surface 11 tilts along with leaving bight 17B.Similarly, on another cutting edge 17, the circular arc first cutting edge 17C and the second cutting edge 17D have also been formed.

In addition, on the end face 12 except that above-mentioned inclined-

plane

12A, 12A, so alternately arranging a plurality of grooves 14 and projection 15, promptly they extend on the direction of intersecting with blade 10 length directions respectively.Form serration 16 by these grooves 14 and projection 15.When these grooves 14 and protruding 15 were parallel to each other respectively, they roughly were spaced sets, and groove 14 forms abreast with bottom surface 11.A plurality of grooves 14 of formation serration 16 are made of smooth curved surface respectively with projection 15 and link to each other sleekly.In addition, constitute these grooves 14 and projection 15 circular

arc cutting edge

17,17 places that always arrive in end face 12 crest line portions of serration 16, the result, when seeing from the side, the length of almost whole cutting edge 17 (cutting edge 17 except that the first oblique cutting edge 17C and the second oblique cutting edge 17D) is the waveform that is made of smooth curve shown in Fig. 3,4.

Figure 5 illustrates when with groove 14 cross section vertical with protruding 15 bearing of trends on groove 14 when seeing serration 16 and the shape of projection 15.As shown in Figure 5,15 one-tenths its radius of curvature a of projection 11 become protruding curve shape towards end face 12 (top of Fig. 5) from the bottom surface, simultaneously, 14 one-tenth its radius of curvature of groove b from end face 12 towards the bottom surface the recessed curve shape of 11 (belows of Fig. 5) change.Therefore, these become curvilinear groove 14 to be connected sleekly with projection 15 and have constituted waveform cutting edge 17.

Under this occasion, the radius of curvature a of projection 15 is set to 1.0 millimeters-10.0 millimeters, and the radius of curvature b of groove 14 is set to 1.0 millimeters-10.0 millimeters, and still, the pass between radius of curvature a, the b is a＞b.

In addition, between protruding 15

summit

15A and 14 end of the groove 14A and promptly be set to 0.3 millimeter-3.0 millimeters perpendicular to the distance h on the direction of bottom surface 11 at blade 10 thickness directions.

In addition, between the summit 15A of adjacent protrusion 15 apart from p promptly between the projection 15 distance be set to 1.0 millimeters-10.0 millimeters.Distance between 14 end of the groove 14A also and protruding 15 summit 15As between the same apart from p.

In addition, projection 15 and with the front end corner part 17A side (left side of Fig. 5 of one of them cutting edge 17, cutter hub front when blade 10 is installed on the aftermentioned cutter hub 20) inclined angle alpha that become of the relative bottom surface 11 of tangent line S1 of the intersection X1 of adjacent groove 14 (when with along with the front end corner part 17A side of one of them cutting edge 17 of trend from the bottom surface 11 more far awayly incline direction be timing, α＜0 °) absolute value equals the absolute value of the angle of inclination beta that the relative bottom surface 11 of tangent line S2 of the intersection X2 of projection 15 and the groove 14 adjacent with the back vertex angle part 17B side (the cutter hub front the when left side of Fig. 5, blade 10 are installed on the aftermentioned cutter hub 20) of this cutting edge 17 become (β＞0 °).In other words, in Fig. 5, projection 15 is that ground, boundary becomes symmetric shape with its summit 15A, and simultaneously, groove 14 is that ground, boundary becomes symmetric shape with its end 14A also.

Owing to be formed as described above the groove 14 of serration 16 and the cross section of projection 15, so, when 13 seeing by these grooves 14 and projection 15 and during cutting edge 17 in wave shape towards the side on the bearing of trend of groove 14 and projection 15, when promptly seeing (Fig. 3) on the A of Fig. 1 direction of arrow, cutting edge 17 is and equiform waveform shown in Figure 5.

The blade 10 of first embodiment has said structure.Then, by Fig. 6 A, Fig. 6 B and Fig. 7 the double-pole ball end mill of more remodeling that polylith blade 10 as two blades are housed is described.Fig. 6 A is the plane of the end mill(ing) cutter of more remodeling that the blade of first embodiment of the invention is housed, and Fig. 6 B shows the front end face of this end mill(ing) cutter, and Fig. 7 is the side view of this end mill(ing) cutter.

That rotate and the leading section 21 that roughly become columniform cutter hub 20 of axes O that rotates around it of double-pole ball end mill of more remodeling roughly becomes hemispherical.On the opposition side of the clamping pivot center O of leading section 21, so form a pair of

chip pocket

22A, 22B as illustrated in fig. 6, promptly regard as and give front end 21 groovings squarely from cutter hub 20 front.These chip pockets 22A, 22B on the wall of cutter rotation direction T front side, formed blade mount pad 23 respectively.

Blade mount pad 23 is so to be made of bottom surface 23A that constitutes key 23C respectively and the wall 23B that is approximately perpendicular to bottom surface 23A, promptly relatively

chip pocket

22A, 22B wall towards a drop back segment distance and intersect of rotation direction T rear side with the outer peripheral face of front end 21.And as shown in Figure 7, bottom surface 23A so forms, and promptly the rear side towards rotation direction T tilts along with trend cutter hub rear end side.

The blade 10 of first embodiment is to install like this, promptly therein on the blade mount pad 23 of a chip pocket 22A, by be inserted into pinching screw 24 in the through hole 19 make end face 12 towards rotation direction T front side make the side 13 that links to each other with another cutting edge 17 contact wall 23B, the front end corner part 17A of this cutting edge 17 is positioned on the pivot center O, this cutting edge 17 is configured to extend on the outer circumferential side of cutter hub rear end from that, and the rotate rotary motion trace of rotation axis O of this cutting edge 17 roughly becomes hemispherical.In addition, the key 23C that forms on the bottom surface 23A of blade mount pad 23 cooperates with keyway 18 on forming in blade 10 bottom surfaces 11, by this cooperation, has prevented blade 10 dislocation.

At this moment, blade 10 so is installed on the blade mount pad 23, the groove 14 that promptly forms in the serration 16 on blade 10 end faces 12 and projection 15 extend on perpendicular to the direction of cutter pivot center O and relatively the tiltangle of rotary tool axis axes O become 90 °.In addition, the first oblique cutting edge 17C of cutting edge 17 is configured to its axial rake for negative.

In addition, the axial rake of the part between projection 15 on the cutting edge 17 and the groove 14 adjacent with the cutter hub front is set to negative, and the axial rake of the part between projection 15 and the groove 14 adjacent with the cutter hub rear end side just is set to.Promptly so form cutting edge 17 in wave shape, promptly it has from the cutter hub front towards rear end side ground successively repeatedly for negative and be positive axial rake.

Being installed in blade 30 on the blade mount pad 23 of another chip pocket 22B, to be made into the blade 10 of itself and first embodiment much the same but slightly smaller.The front end corner part 37A of blade 30 blades 37 compares with the front end corner part 17A of the cutting edge 17 of the first embodiment blade 10 shown in Fig. 6 A, Fig. 6 B and is positioned on the cutter hub outer circumferential side, simultaneously, cutting edge 37 extends to cutter hub rear end outer circumferential side, and the rotate rotary motion trace of rotation axis O of cutting edge 37 is configured to overlap with the rotary motion trace of the cutting edge 17 of the blade 10 of first embodiment.

At this moment, each groove 14 that becomes the cutting edge 17 of blade 10 rotate rotation axis O rotary motion trace each projection 15 of the position of process and the cutting edge 37 that becomes blade 30 rotate rotation axis O rotary motion trace the position of process be identical, and, each projection 15 that becomes the cutting edge 17 of blade 10 rotate rotation axis O rotary motion trace each groove 14 of the position of process and the cutting edge 37 that becomes blade 30 rotate rotation axis O rotary motion trace the position of process be identical.

Therefore, owing to be blade 10 sides 13 along with being tilted to inboard positive blade gradually to bottom surface 11 from end face 12, so when seeing cutting edge 17 along the direction relative with

end face

12,17 one-tenths of cutting edges are by groove 14 and the protruding 15 mild waveforms that constitute.Therefore, on the surface of the workpiece that the cutting edge 17 of the mild waveform of one-tenth by blade 10 cuts, formed and had equally by the machined surface of tongue with the protruding mild waveform that constitutes, but because

blade

10,30 is installed on the above-mentioned position, so, utilize the cutting of blade 10 successive, when utilizing the cutting of blade 30, the projection 15 of projection by blade 30 cutting edges 37 that remains on the machined surface of workpiece reamed.As a result, can't reduce the surface roughness of workpiece machined surface.

Blade 10 with first embodiment of aforesaid structure can utilize waveform cutting edge 17 to cut off smear metal very brokenly, and this is because have the cause of waveform cutting edge 17 by form the serration 16 that is made of a plurality of grooves 14 and projection on end face 12.Thereby, since in wave shape in the almost whole length range of cutting edge 17, so when carrying out machining on various cutting directions, even if having only the part of cutting edge 17 to be used for cutting, but the cutting edge 17 that is used to cut is in wave shape certainly.As a result, can stably cut off smear metal and keep good chip removal performance.

In addition, form, thereby do not resemble and increase cutting resistance the indentation because the groove 14 of serration 16 is parallel to 11 ground, bottom surface.In addition, even if between the groove 14 and protruding 15 of cutting edge 17, have the workpiece time difference of nipping, also reduced cutting resistance.

In addition, the groove of serration 16 14 and projection 15 are made of curved surface, the result, and the cutting edge 17 that forms in the crest line portion of end face 12 also becomes the waveform that is made of curve, so, guaranteed the intensity of cutting edge 17.

In addition, because groove 14 and projection 15 are formed extended at both sides serration 16 on the direction perpendicular to pivot center O, so, when promptly box lunch carries out machining on various cutting directions, utilize the effect of the cut-out smear metal of cutting edge 17 in wave shape also not reduce.This effect is especially very effective perpendicular to the feed of pivot center O ground the time.

In addition, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, if the distance h on blade 10 thickness directions between 14 end of groove 14A and the protruding 15 summit 15A is too small, the cutting edge 17 that is then formed waveform by these grooves 14 and projection 15 shape that almost is in line, it probably is impossible utilizing cutting edge 17 cut-out smear metals.On the other hand, if distance h is excessive, 17 one-tenth high too big waveforms of low head of cutting edge, this probably also will cause the reduction of edge strength.To this, in first embodiment, distance h suitably is set at 0.3 millimeter-3.0 millimeters, has obtained thus to guarantee edge strength and can stablize the cutting edge 17 that cuts off smear metal.

In addition; when similarly on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend; if too small between the adjacent protrusion 15 summit 15A apart from p; 17 one-tenth very fine and closely woven waveforms of cutting edge then; on the other hand, if excessive apart from p, then cutting edge delays long waveforms for 17 one-tenth very much; thereby, probably can not cut off smear metal.To this, in first embodiment, suitably be set at 1.0 millimeters-10.0 millimeters apart from p, thereby can utilize cutting edge 17 stably to cut off smear metal.

In addition, when similarly on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, if the cross section becomes a of radius of curvature separately, the b of curvilinear groove 14 and projection too small, then groove 14 and projection 15 became sharp, thereby by these grooves 14 and projection 15 and cutting edge 17 in wave shape also becomes same shape, as a result, probably can't guarantee the intensity of cutting edge.On the other hand, if radius of curvature a, b are excessive,, thereby cut off the effect reduction of smear metal then because cutting edge delays long waveforms for 17 one-tenth very much.To this, in first embodiment, according to radius of curvature a, b respectively 1.0 millimeters-10.0 millimeters cross section curve shape formation groove 14 and projection 15, guarantee the intensity of cutting edge thus and guaranteed smear metal cut-out effect well.

In addition, owing to form inclined-plane 12A on end face 12, so there is the first oblique cutting edge 17C of the front end corner part 17A that is positioned at cutting edge 17, the result can reduce the nose angle that cutting edge 17 leading sections of high cutting load are born in peripheral speed and increase.Therefore, owing on the end face 12 of the part that has reduced blade 10 thickness by inclined plane 12A, do not form serration 16, thereby strengthened the rigidity of blade 10.But, in first embodiment,, can guarantee also can not form inclined-plane 12A under the enough thick occasion of blade 10 though on the both end sides part of the length direction of blade 10 end faces 12, formed inclined-plane 12A.

In first embodiment, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with the cutter hub front with protruding 15 and the groove 14 adjacent with the cutter hub rear end side between the absolute value of angle of inclination beta of tangent line S2 of intersection X2 be identical, but these inclined angle alpha, β also can be different.

For example, according to first variation shown in Figure 8, also can so form serration 16, promptly when seeing groove 14 and protruding 15 time on the cross section perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the relative bottom surface 11 of tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with cutter hub front (left side of Fig. 8) is greater than the absolute value of the angle of inclination beta of the tangent line S2 of the intersection X2 between projection 15 groove 14 adjacent with cutter hub rear end side (right side of Fig. 8).

When such formation, the part between projection 15 on the cutting edge 17 and the groove 14 adjacent with the cutter hub front promptly has been set to the contraction in length of the cutting edge 17 of bearing axial rake when blade 10 is installed on the cutter hub 20.In addition, the part between projection 15 and the groove 14 adjacent with the cutter hub rear end side of cutting edge 17 promptly is set to the length increase of the cutting edge 17 of positive axial rake to blade 10 when be installed on the cutter hub 20.As a result, the sharpness of cutting edge 17 in wave shape has improved.

In addition, under the different occasion of these inclined angle alpha, β, as above-mentioned first embodiment, so form serration 16, promptly a plurality of grooves 14 and projection 15 are extended on the direction of intersecting with blade 10 end faces 12 length directions.The a pair of cutting

edge

17,17 that forms in the crest line portion of end face 12 is in wave shape, blade can be enough twice occasion under, compare with the shape of one of them cutting edge 17, another cutting edge 17 must become diametical shape (absolute value of the inclined angle alpha of one of them cutting edge 17 equals the absolute value of the angle of inclination beta of another cutting edge 17, and the absolute value of the angle of inclination beta of a cutting edge 17 equals the absolute value of the inclined angle alpha of another cutting edge 17).

Under such occasion, for example on the central portion of blade 10 end faces 12, do not form serration 16, only on the peripheral separately end face 12 of a pair of cutting edge 17, form serration 16 with ideal form.If do like this, no matter use which of one of them cutting edge 17 or another cutting edge 17, can utilize the cutting of cutting edge 17 with ideal form.

In addition, with first embodiment differently, be that the groove 14 of serration 16 and projection 15 are not to be made of curved surface respectively and to form the groove 14 of these curved surfaces and projection 15 to be connected with each other and to form waveform cutting edge 17, intersection by planar shaped grooving 14 and projection 15, on the cross section perpendicular to the groove 14 and the bearing of trend of projection 15, curved groove 14 links to each other by straight line portion sleekly with curved protruding 15.

For example, as second variation shown in Figure 9, the groove 14 of the serration 16 of above-mentioned first variation also can link to each other by straight line portion 16A with projection 15.When such formation, can obtain to have the waveform cutting edge 17 of appropriate characteristics according to supposition cutting situation.Tangent line S2 under such occasion is identical with the straight line portion 16A of link slot 14 and projection 15.

Therefore then, second embodiment of the invention is described, the part the same with above-mentioned first embodiment adopted identical symbol and omitted explanation to it.

Figure 10 is the oblique view of the blade of second embodiment, and Figure 11 is the vertical view of this blade, and Figure 12 is a plane of loading onto the ball end mill of more remodeling of this blade.

Except the bearing of trend of the groove 14 of serration 16 and projection 15, the blade 40 of second embodiment has the same structure with above-mentioned first embodiment.

Promptly, as Figure 10-shown in Figure 12, constitute the groove 14 of serration 16 and projection 15 when blade 40 is installed on the cutter hub 20 along with trend cutter hub front near the direction of cutter hub outer circumferential side the tiltangle of the pivot center O of extension and its relative ball end mill be set to 30 °-90 °.In illustrated embodiment, for example so form serration 16, promptly groove 14 and projection 15 tiltangles that relatively rotate axes O are set to 45 °.

In a second embodiment, on the inclined-plane of end face 12 12A, also formed serration 16.

According to the blade 40 of second embodiment, except above-mentioned effect,, the bearing of trend of groove 14 and projection 15 is set to 30 °-90 ° because relatively rotating the tiltangle of axes O, so, can on whole cutting edge 17 length, keep suitable waveform shape.As a result, when promptly box lunch carried out machining on various cutting directions, the effect of utilizing cutting edge in wave shape 17 to cut off smear metal did not reduce yet.

On the other hand, too small if the bearing of trend of groove 14 and projection 15 relatively rotates the tiltangle of axes O, then the cutter hub rear end side of cutting edge 17 partly becomes very mild waveform, at cutter hub rear end side place, probably can't utilize the smear metal of cutting edge 17 to cut off.On the contrary, if tiltangle is excessive, then the cutter hub front of cutting edge 17 partly becomes very mild waveform, on the cutter hub front, probably can't utilize cutting edge 17 to cut off smear metal.

In a second embodiment, obviously also can constitute the groove 14 and projection 15 shapes that can be shown in Fig. 8,9 of serration 16 as first variation and second variation of above-mentioned first embodiment.

In addition, a plurality of grooves 14 of serration 16 and the shape of projection 15 are not limited to the described shape of the various embodiments described above, can arbitrarily design described shape according to the shape that can cut off cutting edge 17 smear metal that produces.

In addition, in the various embodiments described above, roughly become fusiform blade although form a pair of cutting edge 17 and use, blade shapes is not limited to this, also can adopt the blade that only forms cutting edge on blade one side.

Below, the third embodiment of the present invention is described, the structure the same and/or have the part of same function to adopt same-sign and omitted explanation to it with above-mentioned first embodiment.

Figure 13 is the oblique view of the blade of third embodiment of the invention, and Figure 14 is the vertical view of this blade, and Figure 15 is the view along the A direction of arrow of this blade, and Figure 16 is the view of this blade along the B direction of arrow.

The blade 10a of the 3rd embodiment and the blade of first embodiment 10 be the samely by constituting as hard materials such as superhard alloys, as Figure 13-shown in Figure 16, it be roughly become fusiform and side 13 from the bottom surface 11 to the outward-dipping gradually positive blade in end face 12 ground.

And, be made in the plane 12B parallel around the through hole 19 of end face 12 central authorities in the end face except that inclined- plane 12A 12 with bottom surface 11, promptly form in around the 12B of plane cutting edge 17 in the end face 12 crest line portions near, formed a plurality of grooves 14 and projection 15 is alternately arranged the serration 16 that forms.These grooves 14 are roughly equally spaced arranged with projection 15 and are parallel with bottom surface 11.With the blade 10 the same ground of first embodiment, a plurality of grooves 14 of formation serration 16 are made of smooth curved surface respectively with projection 15 and link to each other sleekly each other.In addition, a plurality of grooves 14 of serration 16 and projection 15 are relative respectively intersects vertically on extension and any position at cutting edge 17 on perpendicular to the direction that forms in the end face 12 crest line portions and cutting edge 17 roughly in the arc-shaped.As a result, when seeing from the side, the whole length of cutting edge 17 (cutting edge 17 except that the first oblique cutting edge 17C, the second oblique cutting edge 17D) is the waveform that is made of smooth curve shown in Figure 15,16.

Therefore, by the groove 14 of serration 16 with projection 15 and the blade 10 of the shape of cutting edge 17 in wave shape and above-mentioned first embodiment shown in Figure 5 is the same.In other words, be made into its radius of curvature a in

projection

15 and 11 become the protruding curved while to end face 12 ground from the bottom surface, groove 14 is made into its radius of curvature b and becomes recessed curve shape from end face 12 to bottom surface 11.And the groove 14 that constitutes these curve shapes also constitutes waveform cutting edge 17 thus with 15 slick and sly connections of projection.

Under this occasion, be set in 1.0 millimeters-10.0 millimeters at the radius of curvature a of projection 15, the radius of curvature b of groove 14 is set 1.0 millimeters-10.0 millimeters.But, the relation of these radius of curvature a, b is a＞b.

In addition, between the protruding 15 summit 15A apart from p promptly the distance between the projection 15 be set to 1.0 millimeters-10.0 millimeters.Distance between 14 end of the groove 14A also with protruding summit 15A between the same apart from p.

In addition; The absolute value of the inclined angle alpha that the relative bottom surface 11 of tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with the front end corner part 17A side (the cutter hub front when blade 10a is installed on the aftermentioned cutter hub 20) of one of them cutting edge 17 forms (with the direction that tilts away from more from bottom surface 11 along with the front end corner part 17A side of this cutting edge 17 of trend for just, α＜0) with protruding 15 and the groove 14 adjacent with the rear vertex angle part 17B side (the cutter hub rear end side when blade 10a is installed on the aftermentioned cutter hub 20) of this cutting edge 17 between the absolute value of the angle of inclination beta (β＞0) that forms of the relative bottom surface 11 of tangent line S2 of intersection X2 be identical (α=-β). That is, be when ground, boundary becomes symmetric shape with its summit 15A in projection 15, groove 14 is that ground, boundary becomes symmetric shape with bottom land 14A also.

Owing to be formed as described above the groove 14 of serration 16 and the cross section of projection 15, so, when on the bearing of trend of groove 14 and projection 15, relatively seeing when forming the cutting edge 17 of waveform by these grooves 14 and projection 15 with side 13, promptly on the A of Figure 13 direction of arrow, cutting edge 17 is and above-mentioned equiform waveform shown in Figure 5.

The blade 10a of the 3rd embodiment has said structure.Then, illustrate by Figure 17 A, Figure 17 B and Figure 18 more the remodel double blade ball end mill of polylith as two blades is housed.Figure 17 A is the plane of the end mill(ing) cutter of more remodeling of the blade of the 3rd embodiment, and Figure 17 B shows the front end face of this end mill(ing) cutter, and Figure 18 is the side view of this end mill(ing) cutter.

This ball end mill of more remodeling has the structure the same with the ball end mill of more remodeling of first embodiment.Promptly, the leading section 21 of the cylindrical cutter body 20 that the rotation axis that rotates O rotates roughly becomes hemispherical, on the reciprocal side of the pivot center O that clamps leading section 21, so form a pair of

chip pocket

22A, 22B, promptly regard as and give front end 21 groovings squarely from cutter hub 20a front.These chip pockets 22A, 22B on the wall of cutter rotation direction T front side, formed blade mount pad 23 respectively.

Blade mount pad 23 is so to be made of bottom surface 23A that constitutes key 23C respectively and the wall 23B that is approximately perpendicular to bottom surface 23A, i.e.

chip pocket

22A, 22B wall and towards a drop back segment distance and intersect with the outer peripheral face of front end 21 of rotation direction T rear side relatively.And the rear side towards rotation direction T tilts bottom surface 23A along with trend cutter hub rear end side.

The blade 10a of the 3rd embodiment installs like this, promptly therein on the blade mount pad 23 of a chip pocket 22A, by be inserted into pinching screw 24 in the through hole 19 make end face 12 towards rotation direction T front side make the side 13 that links to each other with another cutting edge 17 contact wall 23B, the front end corner part 17A of this cutting edge 17 is positioned on the pivot center O, this cutting edge 17 is configured to extend on the outer circumferential side of cutter hub rear end from that, and the rotate rotary motion trace of rotation axis O of this cutting edge 17 roughly becomes hemispherical.In addition, the key 23C that forms on the bottom surface 23A of blade mount pad 23 cooperates with keyway 18 on forming in blade 10a bottom surface 11, by this cooperation, has prevented blade 10a dislocation.

At this moment, blade 10a so is installed on the blade mount pad 23, the groove 14 that promptly forms in the serration 16 on the blade 10a end face 12 and projection 15 extend on perpendicular to the direction of cutter pivot center O and relatively the tiltangle of rotary tool axis axes O become 90 °.In addition, the first oblique cutting edge 17C of cutting edge 17 is configured to its axial rake for negative.

Being installed in blade 30a on the blade mount pad 23 of another chip pocket 22B, to be made into the blade 10a of itself and first embodiment much the same but slightly smaller.The front end corner part 37A of blade 30a blade 37 compares with the front end corner part 17A of the cutting edge 17 of the first embodiment blade 10a shown in Figure 17 A, Figure 17 B and is positioned on the cutter hub outer circumferential side, simultaneously, cutting edge 37 extends to cutter hub rear end outer circumferential side, and the rotate rotary motion trace of rotation axis O of cutting edge 37 is configured to overlap with the rotary motion trace of the cutting edge 17 of the blade 10a of first embodiment.

At this moment, each groove 14 that becomes blade 10a cutting edge 17 rotate rotation axis O rotary motion trace position and each projection 15 that becomes blade 30a cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical, and, each projection 15 that becomes blade 10a cutting edge 17 rotate rotation axis O rotary motion trace position and each groove 14 that becomes blade 30a cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical.

Therefore, owing to be blade 10a side 13 along with from the end face 12 positive blade of oblique inboard to bottom surface 11 and gradually, so when seeing cutting edge 17 along the direction relative with

end face

12,17 one-tenths of cutting edges are by groove 14 and the protruding 15 mild waveforms that constitute.Therefore, on the surface of the workpiece that the cutting edge 17 of the mild waveform of one-tenth by blade 10a cuts, formed and had equally by the machined surface of tongue with the protruding mild waveform that constitutes, but because blade 10a, 30a are installed on the above-mentioned position, so, utilize the cutting of blade 10a successive, when utilizing the cutting of blade 30a, the projection 15 of projection by blade 30a cutting edge 37 that remains on the machined surface of workpiece reamed.As a result, can't reduce the surface roughness of workpiece machined surface.

Blade 10a with first embodiment of aforesaid structure can utilize waveform cutting edge 17 to cut off smear metal very brokenly, and this is because have the cause of waveform cutting edge 17 by form the serration 16 that is made of a plurality of grooves 14 and projection on end face 12.Thereby owing to almost forming waveform in whole cutting edge 17 length ranges, when carrying out machining on various cutting directions, even if having only the part of cutting edge 17 to be used for cutting, but the cutting edge 17 that is used to cut is in wave shape certainly.As a result, can stably cut off smear metal and keep good chip removal performance.

In addition, form, do not increase cutting resistance the indentation so resemble because the groove 14 of serration 16 is parallel to 11 ground, bottom surface.In addition, even if the workpiece of between the groove 14 of cutting edge 17 and projection 15, nipping the time be carved with deviation, also reduced cutting resistance.

In addition, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, if the distance h on blade 10a thickness direction between 14 end of groove 14A and the protruding 15 summit 15A is too small, then by these grooves 14 and projection 15 cutting edges 17 that the form waveform shape that almost is in line, it probably is irrealizable utilizing the smear metal cut-out of cutting edge 17.On the other hand, if distance h is excessive, 17 one-tenth high too big waveforms of low head of cutting edge, this probably also will cause the reduction of edge strength.To this, in first embodiment, distance h suitably is set at 0.3 millimeter-3.0 millimeters, has obtained thus to guarantee edge strength and can stablize the cutting edge 17 that cuts off smear metal.

In addition; when similarly on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend; if too small between the adjacent protrusion 15 summit 15A apart from p; 17 one-tenth very narrow close waveforms of cutting edge then; on the other hand, if excessive apart from p, then cutting edge delays long waveforms for 17 one-tenth very much; thereby, probably can not cut off smear metal.To this, in first embodiment, suitably be set at 1.0 millimeters-10.0 millimeters, thereby can utilize the stable smear metal of cutting edge 17 to cut off apart from p.

In addition, when similarly on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, if the cross section becomes a of radius of curvature separately, the b of curvilinear groove 14 and projection 15 too small, then groove 14 and projection 15 became sharp, thereby also become same shape with projection 15 cutting edges 17 that form waveform by these grooves 14, as a result, probably can't guarantee edge strength.On the other hand, if radius of curvature a, b are excessive, then, reduce so cut off the effect of smear metal because cutting edge delays long waveforms for 17 one-tenth very much.To this, in first embodiment, according to radius of curvature a, b respectively 1.0 millimeters-10.0 millimeters cross section curve shape formation groove 14 and projection 15, guarantee edge strength thus and guaranteed smear metal cut-out effect well.

In addition, owing to form inclined-plane 12A on end face 12, so existence is positioned at the first oblique cutting edge 17C of the front end corner part 17A of cutting edge 17, the result can reduce the nose angle that cutting edge 17 leading sections of high cutting load are born in peripheral speed and increase.Therefore, owing on the end face 12 of the part that has reduced blade 10a thickness by inclined plane 12A, do not form serration 16, so improved the rigidity of blade 10a.But, in the 3rd embodiment,, can guarantee also can not form inclined-plane 12A under the enough thick occasion of blade 10a though on the both end sides part of the length direction of blade 10a end face 12, formed inclined-plane 12A.

In the 3rd embodiment, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with the cutter hub front with protruding 15 and the groove 14 adjacent with the cutter hub rear end side between the absolute value of angle of inclination beta of tangent line S2 of intersection X2 be identical, but these inclined angle alpha, β also can be different.

For example, the same ground of first variation with first embodiment shown in Figure 8, also can so form serration 16, promptly when seeing groove 14 and protruding 15 time on the cross section perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the relative bottom surface 11 of tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with cutter hub front (left side of Fig. 8) is greater than the absolute value of the angle of inclination beta of the tangent line S2 of the intersection X2 between projection 15 groove 14 adjacent with cutter hub rear end side (right side of Fig. 8).

When such formation, the part between projection 15 on the cutting edge 17 and the groove 14 adjacent with the cutter hub front promptly has been set to the contraction in length of the cutting edge 17 of bearing axial rake when blade 10a has been installed in when cutter hub 20a goes up.In addition, the part between projection 15 and the groove 14 adjacent with the cutter hub rear end side of cutting edge 17 is promptly when the length increase that blade 10a is installed in the cutting edge 17 that is set to positive axial rake when cutter hub 20a goes up.As a result, the sharpness of cutting edge 17 in wave shape has improved.

In addition, with the 3rd embodiment differently, be that the groove 14 of serration 16 and projection 15 are not to be made of curved surface respectively and to form the groove 14 of these curved surfaces and projection 15 to be connected with each other and to form waveform cutting edge 17, but by the intersection of planar shaped grooving 14 with projection 15, on the cross section perpendicular to the groove 14 and the bearing of trend of projection 15, curved groove 14 links to each other by straight line portion sleekly with curved protruding 15.

For example, with the same ground of second variation shown in Figure 9, the groove 14 of the serration 16 of above-mentioned first variation also can link to each other by straight line portion 16A with projection 15.When such formation, can obtain to have the waveform cutting edge 17 of appropriate characteristics according to supposition cutting situation.Tangent line S2 under such occasion is identical with the straight line portion 16A of link slot 14 and projection 15.

Different with above-mentioned the 3rd embodiment, promptly not groove 14 and the projection 15 that forms serration 16 with bottom surface 11 abreast, but in the direction that is toward or away from bottom surface 11 along with leaving cutting edge 17 tilt landform grooving and projection.As fourth embodiment of the invention such situation is described.

Figure 19 is the oblique view of the blade of the 4th embodiment.

The blade 40a of the 4th embodiment has the same structure with above-mentioned the 3rd embodiment, and difference is that the groove 14 of serration 16 tilts with projection 15 relative bottom surfaces 11.In other words, as shown in figure 19, constituting the groove 14 of serration 16 and projection 15 and tilt near bottom surface 11 sides ground along with leaving cutting edge 17, relative bottom surface 11, its angle of inclination is set to+and 7 °, give cutting edge 17 1 positive rake angles.In this inclination angle, with along with leaving cutting edge 17 near the direction of bottom surface 11 sides for just, with the direction of leaving bottom surface 11 along with leaving cutting edge 17 for negative, promptly, with the direction of giving 17 1 positive rake angles of cutting edge for just, with the direction of giving an one negative rake for negative.

Blade 40a according to the 4th embodiment, except above-mentioned effect, because groove 14 and projection 15 are in that the direction near bottom surface 11 sides tilts along with leaving cutting edge 17, so, give cutting edge 17 1 positive rake angles, as a result, guaranteed the sharpness of cutting edge 17 and stable cutting state is continued well.If the consideration edge strength, then preferably will decide this inclination angle be set at+below 17 °.

As mentioned above, groove 14 and projection 15 obviously also can not be to tilt near bottom surface 11 sides ground along with leaving cutting edge 17, but tilt in the direction of leaving bottom surface 11 along with leaving cutting edge 17, thus can 17 1 negative rakes of wind and rain cutting edge.If consider the intensity of cutting edge 17, then preferably will be set at the inclination angle under this occasion-more than 10 °.

Certainly, in the 4th embodiment, cutting edge 17 is made shape shown in Fig. 8,9 with also can resembling first, second variation of above-mentioned first embodiment.

In addition, the shape of a plurality of grooves of serration 16 14 and projection 15 is not limited to the described shape of the 3rd, the 4th embodiment, can set arbitrarily according to the shape that can cut off the smear metal that cutting edge 17 produces.In addition, though what adopt in the 3rd, the 4th embodiment is to form a pair of cutting edge 17 and use the mode that roughly becomes the spindle blade, blade shapes is not limited to this, only also can use the blade at blade one side formation cutting edge.

The fifth embodiment of the present invention below is described, structure identical with above-mentioned first embodiment and/or the part with same function adopt same-sign and have therefore omitted explanation to it.

Figure 20 is the oblique view of fifth embodiment of the invention blade, and Figure 21 is the vertical view of this blade, and Figure 22 is the view of this blade along the A direction of arrow, and Figure 23 is the view of this blade along the B direction of arrow.

The blade 10b of the 5th embodiment and the blade of first embodiment 10 the same ground as make by hard materials such as superhard alloys, as Figure 20-shown in Figure 23, it be roughly become the spindle shape and side 13 from the bottom surface 11 to the outward-dipping gradually positive blade in end face 12 ground.

And, be made in the plane 12B parallel around the through hole 19 of end face 12 central authorities in the end face except that inclined- plane 12A 12 with bottom surface 11, promptly form in around the 12B of plane cutting edge 17 in the end face 12 crest line portions near, along the circular arc that forms cutting edge 17 formed a plurality of from the bottom surface 11 to the outstanding some 16a of portion of end face 12.These 16a of roughly equally spaced arrange and intersect with cutting edge 17.When a 16a of portion also is made of smooth curved surface, between consecutive points portion 16, also pass through to link to each other by smooth curved surface.

In addition, the some 16a of portion so links to each other with end face 12, and promptly when its summit (the summit 15A of the projection 15 of cutting edge 17 described later) was positioned on the cutting edge 17, it moved closer to 11 ground, bottom surface along with leaving cutting edge 17.11 one-tenth parallel shapes in end face 12 relative bottom surfaces between a 16a of portion.

In addition, the width separately of each some 16a of portion promptly reduces along with leaving cutting edge 17 gradually along the length of cutting edge 17 bearing of trends.As a result, the width of the end face 12 between a 16a of portion (end face 12 that links to each other with the groove 14 of aftermentioned cutting edge 17) promptly increases along with leaving cutting edge 17 gradually along the length of cutting edge 17 bearing of trends.

Therefore, form a plurality of the such 16a of portion with cutting edge 17 crossingly, the result, when seeing from the side, almost the whole length of cutting edge 17 (cutting edge 17 except that the first oblique cutting edge 17C and the second oblique cutting edge D) is a plurality of grooves 14 of being made of smooth curve and projection 15 is alternately arranged the waveform that forms shown in Fig. 3,4.

Thereby the shape of cutting edge 1 that forms waveform by the groove of the 16a of portion 14 and projection 15 is the same with the blade 10 of as shown in Figure 5 above-mentioned first embodiment.That is, projection 15 be made into its radius of curvature a from bottom surface 11 towards end face 12 become protruding curve shape in, groove 14 is made into its radius of curvature b and 11 becomes recessed curve shape from end face 12 towards the bottom surface.Therefore, the groove 14 that constitutes these curve shapes is connected sleekly with projection 15 and forms waveform cutting edge 17.

Under this occasion, be set in 1.0 millimeters-10.0 millimeters at the radius of curvature a of projection 15, the radius of curvature b of groove 14 is set to 1.0 millimeters-10.0 millimeters, and still, the relation between these radius of curvature a, the b is a＞b.

In addition, promptly be set to 0.3 millimeter-3.0 millimeters at blade 10a thickness direction between protruding 15

summit

15A and 14 end of the groove 14A perpendicular to the distance h on the direction of bottom surface 11.

Between the adjacent protrusion 15 summit 15A apart from p promptly the distance between the projection 15 be set to 1.0 millimeters-10.0 millimeters, the distance between 14 end of the groove 14A also with protruding 15 summit 15A between the same apart from p.

In addition, in addition, the inclined angle alpha that the relative bottom surface 11 of tangent line S1 of the intersection X1 of projection 15 and the groove 14 adjacent with the front end corner part 17A side of one of them cutting edge 17 (blade 10a is installed in the cutter hub front of aftermentioned cutter hub 20a when going up) is become (when with along with the front end corner part 17A side of this cutting edge 17 of trend from the bottom surface 11 more far awayly incline direction be timing, α＜0 °) absolute value equal protruding 15 angle of inclination beta that become with the relative bottom surface 11 of tangent line S2 of the intersection X2 of the groove 14 adjacent (β＞0 °) with the back vertex angle part 17B side (the cutter hub front when blade 10 is installed on the aftermentioned cutter hub 20) of this cutting edge 17 absolute value (α=-β).In other words, in Fig. 5, projection 15 is that ground, boundary becomes symmetric shape with its summit 15A, and simultaneously, groove 14 is that ground, boundary becomes symmetric shape with its end 14A also.

The blade 10b of the 5th embodiment has said structure.Then, illustrate by Figure 24 A, Figure 24 B and Figure 25 more the remodel ball end mill of polylith as two blade 10b is housed.Figure 24 A is the plane of the end mill(ing) cutter of more remodeling that the blade of the 5th embodiment is housed, and Figure 24 B shows the front end face of this end mill(ing) cutter, and Figure 25 is the side view of this end mill(ing) cutter.

This ball end mill of more remodeling has the structure the same with the ball end mill of more remodeling of first embodiment.Promptly, the leading section 21 of the cylindrical cutter body 20b that the rotation axis that rotates O rotates roughly becomes hemispherical, on the reciprocal side of the pivot center O that clamps leading section 21, so form a pair of

chip pocket

22A, 22B, promptly regard as and give front end 21 groovings squarely from cutter hub 20b front.These chip pockets 22A, 22B on the wall of cutter rotation direction T front side, formed blade mount pad 23 respectively.

chip pocket

22A, 22B wall and towards a drop back segment distance and intersect with the outer peripheral face of front end 21 of rotation direction T rear side relatively.And bottom surface 23A tilts towards rotation direction T rear side along with trend cutter hub rear end side.

The blade 10b of the 5th embodiment installs like this, promptly therein on the blade mount pad 23 of a chip pocket 22A, by be inserted into pinching screw 24 in the through hole 19 make end face 12 towards rotation direction T front side make the side 13 that links to each other with another cutting edge 17 contact wall 23B, the front end corner part 17A of this cutting edge 17 is positioned on the pivot center O, this cutting edge 17 is configured to extend on the outer circumferential side of cutter hub rear end from that, and the rotate rotary motion trace of rotation axis O of this cutting edge 17 roughly becomes hemispherical.In addition, the key 23C that forms on the bottom surface 23A of blade mount pad 23 cooperates with keyway 18 on forming in blade 10b bottom surface 11, by this cooperation, has prevented blade 10b dislocation.

At this moment, blade 10b so is installed on the blade mount pad 23, the groove 14 that promptly forms in the serration 16 on the blade 10b end face 12 and projection 15 extend on perpendicular to the direction of cutter pivot center O and relatively the tiltangle of rotary tool axis axes O become 90 °.In addition, the first oblique cutting edge 17C of cutting edge 17 is configured to its axial rake for negative.

Being installed in blade 30b on the blade mount pad 23 of another chip pocket 22B, to be made into the blade 10b of itself and the 5th embodiment much the same but slightly smaller.The front end corner part 37A of blade 30b blade 37 compares with the front end corner part 17A of the cutting edge 17 of the 5th embodiment blade 10b shown in Figure 24 A, Figure 24 B and is positioned on the cutter hub outer circumferential side, simultaneously, cutting edge 37 extends to cutter hub rear end outer circumferential side, and the rotate rotary motion trace of rotation axis O of cutting edge 37 is configured to overlap with the rotary motion trace of the cutting edge 17 of the blade 10b of the 5th embodiment.

At this moment, each groove 14 that becomes blade 10b cutting edge 17 rotate rotation axis O rotary motion trace position and each projection 15 that becomes blade 30b cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical, and, each projection 15 that becomes blade 10b cutting edge 17 rotate rotation axis O rotary motion trace position and each groove 14 that becomes blade 30b cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical.

Therefore, owing to be blade 10b side 13 along with from the end face 12 positive blade of oblique inboard to bottom surface 11 and gradually, so when seeing cutting edge 17 along the direction relative with

end face

12,17 one-tenths of cutting edges are by groove 14 and the protruding 15 mild waveforms that constitute.Therefore, on the surface of the workpiece that the cutting edge 17 of the mild waveform of one-tenth by blade 10b cuts, formed and had equally by the machined surface of tongue with the protruding mild waveform that constitutes, but because blade 10b, 30b are installed on the above-mentioned position, so, utilize the cutting of blade 10b successive, when utilizing the cutting of blade 30b, the projection 15 of projection by blade 30b cutting edge 37 that remains on the machined surface of workpiece reamed.As a result, can't reduce the surface roughness of workpiece machined surface.

Have as mentioned above that the blade 10b of the 5th embodiment of structure can utilize waveform cutting edge 17 to cut off very brokenly to smear metal, this is because have the cause of waveform cutting edge 17 by form the some 16a of portion that is made of a plurality of grooves 14 and projection on end face 12.Thereby owing to almost forming waveform in whole cutting edge 17 length ranges, when carrying out machining on various cutting directions, even if having only the part of cutting edge 17 to be used for cutting, but the cutting edge 17 that is used to cut is in wave shape certainly.As a result, can stably cut off smear metal and keep good chip removal performance.

In addition, form, do not increase cutting resistance the indentation so resemble because the groove 14 of the some 16a of portion is parallel to 11 ground, bottom surface.In addition, even if the workpiece of between the groove 14 of cutting edge 17 and projection 15, nipping the time be carved with deviation, also reduced cutting resistance.

In addition and since by be projected into the some 16a of portion on the end face 12 constitute cutting edge 17 projection 15 and with these cutting edge 17 projectioies 15 point 16a of portion that link to each other along with leaving cutting edge 17 near the inclination of ground, bottom surface, so, give 15 1 positive rake angles of projection of cutting edge 17.As a result, kept the sharpness of cutting edge 17 also stable cutting state is continued well.Especially, on axial rake is set to projection 15 and the part between the groove 14 adjacent with the cutter hub front on the positive cutting edge 17, obtained remarkable result.

At this moment, the anterior angle that is endowed the cutting edge 17 of waveform cutting edge 17 is becoming maximum and becoming minimum (0 °) on 14 end of the groove on the cutting edge 17 14A on the 15 summit 15A of the projection on the cutting edge 17.The end face 12 that links to each other with groove 14 on the cutting edge 17 is tilted near 11 ground, bottom surface along with leaving cutting edge 17, and the groove 14 that also can give cutting edge 17 is with positive rake angle.

In addition, when forming the smooth curved surface ground protrusion formation point 16a of portion, also link to each other the result between the some 16a of portion with slick and sly curved surface, the cutting edge 17 that forms in the crest line portion between end face 12 and the side 13 also becomes the waveform shape that is made of curve, thereby has guaranteed the intensity of cutting edge 17.

In addition, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, if the distance h on blade 10a thickness direction between 14 end of groove 14A and the protruding 15 summit 15A is too small, the cutting edge 17 that is then formed waveform by these grooves 14 and projection 15 shape that almost is in line, it probably is irrealizable utilizing the smear metal cut-out of cutting edge 17.On the other hand, if distance h is excessive, 17 one-tenth high too big waveforms of low head of cutting edge, this probably also will cause the reduction of edge strength.To this, in the 5th embodiment, distance h suitably is set at 0.3 millimeter-3.0 millimeters, obtains thus to guarantee edge strength and can stablize the cutting edge 17 that cuts off smear metal.

In addition, owing to form inclined-plane 12A on end face 12, so existence is positioned at the first oblique cutting edge 17C of the front end corner part 17A of cutting edge 17, the result can reduce the nose angle that cutting edge 17 leading sections of high cutting load are born in peripheral speed and increase.Therefore, owing on the end face 12 of the part that has reduced blade 10b thickness by inclined plane 12A, do not form the some 16a of portion, so improved the rigidity of blade 10b.But, in the 5th embodiment,, can guarantee also can not form inclined-plane 12A under the enough thick occasion of blade 10b though on the both end sides part of the length direction of blade 10b end face 12, formed inclined-plane 12A.

In the 5th embodiment, when on cross section, seeing groove 14 and protruding 15 time perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with the cutter hub front with protruding 15 and the groove 14 adjacent with the cutter hub rear end side between the absolute value of angle of inclination beta of tangent line S2 of intersection X2 be identical, but these inclined angle alpha, β also can be different.

For example, the same ground of first variation with first embodiment shown in Figure 8, also can so form a 16a of portion, promptly when seeing groove 14 and protruding 15 time on the cross section perpendicular to its bearing of trend, the absolute value of the inclined angle alpha of the relative bottom surface 11 of tangent line S1 of the intersection X1 between projection 15 and the groove 14 adjacent with cutter hub front (left side of Fig. 8) is greater than the absolute value of the angle of inclination beta of the tangent line S2 of the intersection X2 between projection 15 groove 14 adjacent with cutter hub rear end side (right side of Fig. 8).

When such formation, the part between projection 15 on the cutting edge 17 and the groove 14 adjacent with the cutter hub front promptly has been set to the contraction in length of the cutting edge 17 of bearing axial rake when blade 10b has been installed in when cutter hub 20b goes up.In addition, the part between projection 15 and the groove 14 adjacent with the cutter hub rear end side of cutting edge 17 is promptly when the length increase that blade 10b is installed in the cutting edge 17 that is set to positive axial rake when cutter hub 20b goes up.As a result, the sharpness of cutting edge 17 in wave shape has improved.

In addition, with the 5th embodiment differently, promptly the groove 14 of the some 16a of portion and projection 15 are not to be made of curved surface respectively and to form the groove 14 of these curved surfaces and projection 15 to be connected with each other and to form waveform cutting edge 17, but by the intersection of planar shaped grooving 14 with projection 15, on the cross section perpendicular to the groove 14 and the bearing of trend of projection 15, curved groove 14 links to each other by straight line portion sleekly with curved protruding 15.

For example, with the same ground of second variation shown in Figure 9, the groove 14 of the some 16a of portion of above-mentioned first variation also can link to each other by straight line portion 16A with projection 15.When such formation, can obtain to have the waveform cutting edge 17 of appropriate characteristics according to supposition cutting situation.Tangent line S2 under such occasion is identical with the straight line portion 16A of link slot 14 and projection 15.

And the shape of the some 16a of portion is not limited to the described shape of the 5th embodiment, and the cutting edge 17 that forms waveform by a 16a of portion can be set arbitrarily according to the shape that can cut off smear metal that cutting edge produces.In addition,, be not limited to this, also can adopt the blade that only forms cutting edge in blade one side although form a pair of cutting

edge

17,17 and adopt the blade that roughly becomes leaf shape.

Below, the sixth embodiment of the present invention is described, structure the same with above-mentioned first embodiment and/or the part with same function adopt identical symbol and have omitted explanation to it.

Figure 26 is the oblique view of the blade of sixth embodiment of the invention, and Figure 27 is the vertical view of this blade, and Figure 28 is the view of this blade along the A direction of arrow, and Figure 29 is the view of this blade along the B direction of arrow.

The blade 10c of the 6th embodiment is made by hard materials such as superhard alloys with the blade of first embodiment, 10 the same ground, as Figure 26-shown in Figure 29, its become roughly to become fusiform and side 13 along with 11 trend end faces 12 and outward-dipping gradually positive blade shapes from the bottom surface.

In addition, promptly on the first major flank 13A that links to each other with cutting edge 17, form a plurality of grooves 14 and protruding 15 in the side except that the second major flank 13B and alternately arranged the serration 16 that forms.These grooves 14 and projection 15 are roughly equally spaced arranged and are parallel to each other.With the first major flank 13A that the second oblique cutting edge 17D of cutting edge 17 links to each other on, do not form serration 16.

Therefore, when relatively seeing serration 16 with the first major flank 13A, so form the bearing of trend P of groove 14 and projection 15 as shown in figure 28, promptly its absolute value tilts perpendicular to the direction Q of end face 12 relatively less than 10 ° of ground.In the present embodiment, so form serration 16, i.e. groove 14 and projection 15 bearing of trend P and direction Q identical (0 degree inclination angle) perpendicular to end face 12.

In addition, a plurality of grooves 14 of formation serration 16 are made of smooth curved surface respectively with projection 15 and link to each other sleekly each other.In addition, a plurality of grooves 14 of this serration 16 and projection 15 respectively with the crest line portion that forms in the end face 12 and the first major flank 13A on and cutting edge 17 roughly in the arc-shaped conjointly extend.As a result, when seeing in front view, the length of almost whole cutting edge 17 (cutting edge 17 except that the second oblique cutting edge 17D) is the waveform that is made of smooth curve.

At the first major flank 13A that constitutes side 13 and the second major flank 13B respectively from end face 12 towards the bottom surface 11 in interior inclination, the gradient of the second major flank 13B is set greater than the gradient of the first major flank 13B.As a result, the width of the groove 14 of serration 16 is along with reducing gradually near bottom surface 11 from end face 12 and described groove blocks near the crest line portion between the first major flank 13A and the second major flank 13B.

Therefore, describe the shape that forms the cutting edge 17 of waveform by the groove 14 and protruding 15 of serration 16 in detail by Figure 30.Figure 30 is the state that the cutting edge roughly in the arc-shaped 17 that looks up from the side relative with end face 12 is launched into rectilinear form.When the projection on the cutting edge 17 15 is made into its radius of curvature a curve shape protruding towards the blade 10c outside (top of Figure 30) change, groove 14 on the cutting edge 17 is made into its radius of curvature b and becomes recessed curve shape towards blade 10c inboard (below of Figure 30), and the groove 14 and protruding 15 that constitutes these curve shapes links to each other sleekly and constitutes waveform cutting edge 17.In addition, the relation of the radius of curvature b of the radius of curvature a of projection 15 and groove 14 is a＞b.

And, between protruding 15

summit

15A and 14 end of the groove 14A and the distance h on the direction of cutting edge 17 roughly in the arc-shaped when relatively seeing with end face 12 be set to 0.3 millimeter-3.0 millimeters.This distance h be configured to greater than when blade 10c is contained in be endowed when carrying out machining on the aftermentioned cutter hub 20 cutting edge 17 and in the depth of cut perpendicular to each cutting edge on the direction of cutter pivot center O.

The blade 10c of the 6th embodiment has said structure.Then, illustrate by Figure 31 A, Figure 31 B and Figure 32 more the remodel ball end mill of polylith as two this blade 10c is housed.Figure 31 A is the plane of the end mill(ing) cutter of more remodeling that the blade of the 6th embodiment is housed, and Figure 31 B shows the front end face of this end mill(ing) cutter, and Figure 32 is the side view of this end mill(ing) cutter.

This ball end mill of more remodeling has the structure the same with the ball end mill of more remodeling of first embodiment.That is, the rotate ball end mill of more remodeling of the cylindrical cutter body 20c that rotation axis O rotates has the structure the same with the ball end mill of more remodeling of first embodiment.Promptly, the leading section 21 of the cylindrical cutter body 20c that the rotation axis that rotates O rotates roughly becomes hemispherical, on the reciprocal side of the pivot center O that clamps leading section 21, so form a pair of

chip pocket

22A, 22B, promptly regard as and give front end 21 groovings squarely from cutter hub 20c front.These chip pockets 22A, 22B on the wall of cutter rotation direction T front side, formed blade mount pad 23 respectively.

chip pocket

The blade 10c of the 6th embodiment installs like this, promptly therein on the blade mount pad 23 of a chip pocket 22A, by be inserted into pinching screw 24 in the through hole 19 make end face 12 towards rotation direction T front side make the side 13 that links to each other with another cutting edge 17 contact wall 23B, the front end corner part 17A of this cutting edge 17 is positioned on the pivot center O, this cutting edge 17 is configured to extend on the outer circumferential side of cutter hub rear end from that, and the rotate rotary motion trace of rotation axis O of this cutting edge 17 roughly becomes hemispherical.In addition, the key 23C that forms on the bottom surface 23A of blade mount pad 23 cooperates with keyway 18 on forming in blade 10c bottom surface 11, by this cooperation, has prevented blade 10c dislocation.

Leading section 21 roughly become hemispherical, on the reciprocal side of the pivot center O that clamps leading section 21, so form a pair of

chip pocket

22A, 22B, promptly regard as squarely and give front end 21 groovings from cutter hub 20b front.These chip pockets 22A, 22B on the wall of cutter rotation direction T front side, formed blade mount pad 23 respectively.

chip pocket

At this moment, blade 10c so is installed on the blade mount pad 23, and the groove 14 and the projection 15 that promptly form in the serration 16 on the first major flank 13A that links to each other with one of them cutting edge 17 are extended on the direction consistent with cutter rotation direction T.In addition, the first oblique cutting edge 17C of cutting edge 17 is configured to its axial rake for negative.

Being installed in blade 30c on the blade mount pad 23 of another chip pocket 22B, to be made into the blade 10c of itself and the 6th embodiment much the same but slightly smaller.The front end corner part 37A of blade 30c blade 37 compares with the front end corner part 17A of the cutting edge 17 of the 6th embodiment blade 10c shown in Figure 31 A, Figure 31 B and is positioned on the cutter hub outer circumferential side, simultaneously, cutting edge 37 extends to cutter hub rear end outer circumferential side, and the rotate rotary motion trace of rotation axis O of cutting edge 37 is configured to overlap with the rotary motion trace of the cutting edge 17 of the blade 10c of the 6th embodiment.

At this moment, each groove 14 that becomes blade 10c cutting edge 17 rotate rotation axis O rotary motion trace position and each projection 15 that becomes blade 30c cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical, and, each projection 15 that becomes blade 10c cutting edge 17 rotate rotation axis O rotary motion trace position and each groove 14 that becomes blade 30c cutting edge 37 of process rotate rotation axis O rotary motion trace the position of process be identical.

On the surface of the workpiece that the cutting edge 17 of the mild waveform of one-tenth by blade 10a cuts, formed and had equally by the machined surface of tongue with the protruding mild waveform that constitutes, but because

blade

10c, 30c are installed on the above-mentioned position, so, utilize the cutting of blade 10c successive, when utilizing the cutting of blade 30c, the projection 15 of projection by blade 30c cutting edge 37 that remains on the machined surface of workpiece reamed.As a result, can't reduce the surface roughness of workpiece machined surface.

Blade 10c with the 6th embodiment of aforesaid structure can utilize waveform cutting edge 17 to cut off smear metal very brokenly, and this is because have the cause of waveform cutting edge 17 by form the some 16a of portion that is made of a plurality of grooves 14 and projection on end face 12.Thereby, because the groove 14 and the projection 15 that form on the first major flank 13A are almost forming waveform in whole cutting edge 17 length ranges with cutting edge 17 with intersecting, so almost in the length range of whole cutting edge 17, keep equiform waveform.Therefore, when carrying out machining on various cutting directions, even if having only the part of cutting edge 17 to be used for cutting, but the cutting edge 17 that is used to cut is in wave shape certainly.As a result, can stably cut off smear metal and keep good chip removal performance.

When relatively seeing serration 16 with the first major flank 13A, so form the bearing of trend P of groove 14 and projection 15, be that it tilts perpendicular to the direction Q of end face 12 relatively with the absolute value less than 10 °, thus one, when blade 10c was installed on the cutter hub, the groove 14 of serration 16 was configured to extend on the direction identical with rotation direction T with projection 15.As a result, when carrying out machining, can allow the groove 14 of serration 16 avoid workpiece reliably, prevent the increase of the cutting resistance of the indentation of resembling over thus.When groove 14 and projection 15 bearing of trend P with during greater than 10 °, can not allow the groove 14 of serration 16 avoid workpiece perpendicular to the absolute value at the inclination angle that direction Q became of end face 12, probably can increase cutting resistance.

In addition, the 13 one-tenth multistage face shapes that constitute by the first major flank 13A and the second major flank 13B in side, by form serration 16 on the first major flank 13A, cutting edge 17 is in wave shape, can form the waveform of cutting edge 17 thus reliably.But, owing on the part of the second major flank 13B, do not form serration 16, so unnecessarily do not reduce the rigidity of blade 10.

In addition, in order not form serration 16 on the second major flank 13B, becoming on the bottom surface 11 that installs to the seating surface on the blade mount pad 23, groove 14 and projection 15 do not intersect yet.Therefore, do not reduce the supportive of blade 10c, guaranteed the installation rigidity of blade 10c fully.

And, in the 6th embodiment, as described above, when handle sees relatively that with end face 12 cutting edge roughly in the arc-shaped 17 is launched into linearity, when the groove 14 on cutting edge 17 and projection 15 are made of curve, constitute the groove 14 of these curve shapes and projection 15 slynesses and link to each other and formed cutting edge in wave shape 17.On the contrary, also can on the groove 14 or protruding 15 of cutting edge 17, form straight line portion.

For example, first variation as shown in figure 33, the part that comprises the projection 15 summit 15A of cutting edge 17 shape that also can be in line, second variation as shown in figure 34, the part that comprises cutting edge 17 grooves 14 end 14A shape (actual become curve shape) that can be in line.When such formation, can be according to supposing that the cutting situation obtains the waveform cutting edge 17 with optkmal characteristics.

And under such occasion, on cutting edge 17, under the situation of having considered edge strength, the most handy smooth curve links to each other between the part of the part of formation straight line and formation curve.

In addition, the shape of a plurality of grooves of serration 16 14 and projection 15 is not limited to the shape under the 6th embodiment, can be according to arbitrarily setting with the shape that cutting edge cuts off the smear metal that is produced.In addition,, be not limited to this, also can adopt the blade that only on blade one side, forms cutting edge though form a pair of cutting edge 17 and adopt the blade 10c that roughly becomes leaf shape.

Claims

1, a kind of throw-away tip, it is installed in and is forming in the crest line portion of the end face relative with the bottom surface that becomes seating surface on the cutter hub of a part that cutting edge and the rotary motion trace this cutting edge roughly be circular arc roughly is sphere, it is characterized in that, alternately arrange the serration that forms by form a plurality of grooves and projection on described end face, described cutting edge becomes waveform.

2, throw-away tip as claimed in claim 1 is characterized in that, described groove and projection are made of curved surface.

3, throw-away tip as claimed in claim 1, it is characterized in that, so form described serration, promptly described groove and projection along with trend cutter hub front in the face of extending on the direction of cutter hub outer circumferential side or on and 30 °-90 ° of relative cutter pivot center inclinations perpendicular to the direction of cutter pivot center.

4, throw-away tip as claimed in claim 1, it is characterized in that, when on cross section, seeing described groove and when projection perpendicular to its bearing of trend, between the summit of described bottom land and described projection and the distance on this throw-away tip thickness direction be set to 0.3 millimeter-3.0 millimeters.

5, throw-away tip as claimed in claim 1 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, the distance between the described protruding summit is set to 1.0 millimeters-10.0 millimeters.

6, throw-away tip as claimed in claim 1 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, described groove and projection are made into its radius of curvature and are set to 1.0 millimeters-10.0 millimeters.

7, throw-away tip as claimed in claim 1, it is characterized in that, when seeing on the cross section perpendicular to its bearing of trend described groove and when projection, the absolute value at the inclination angle that the described relatively bottom surface of tangent line of the intersection between the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms and described projection and the described groove adjacent with the cutter hub rear end side forms differs from one another.

8, throw-away tip as claimed in claim 7, it is characterized in that the absolute value at the inclination angle that the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms forms greater than the described relatively bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub rear end side.

9, throw-away tip as claimed in claim 1 is characterized in that, the intersection between described groove and the projection is made of the plane.

10, throw-away tip as claimed in claim 1, it is characterized in that, the described end face that links to each other with the fore-end of described cutting edge is made into along with this cutting edge front end of trend gradually near the inclined-plane of described bottom surface, and described serration forms on the described end face except that this inclined-plane.

11, a kind of throw-away tip, it is installed in the crest line portion of the end face relative with the bottom surface that becomes seating surface and forms cutting edge and the rotary motion trace this cutting edge that roughly is circular arc and roughly be on the cutter hub of piece, it is characterized in that, on described end face, form a plurality of grooves and projection and alternately arranged the serration that forms, so described cutting edge is made waveform, promptly these grooves and projection are extended on perpendicular to the direction of described cutting edge respectively and are intersected with this cutting edge.

12, throw-away tip as claimed in claim 11 is characterized in that, described groove and projection are made of curved surface.

13, throw-away tip as claimed in claim 11 is characterized in that, described groove and projection be close described bottom surface or inclination along with leaving described cutting edge with leaving described bottom surface.

14, throw-away tip as claimed in claim 11, it is characterized in that, when on cross section, seeing described groove and when projection perpendicular to its bearing of trend, between the summit of described bottom land and described projection and the distance on this throw-away tip thickness direction be set to 0.3 millimeter-3.0 millimeters.

15, throw-away tip as claimed in claim 11 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, the distance between the described protruding summit is set to 1.0 millimeters-10.0 millimeters.

16, throw-away tip as claimed in claim 11 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, described groove and projection are made into its radius of curvature and are set to 1.0 millimeters-10.0 millimeters.

17, throw-away tip as claimed in claim 11, it is characterized in that, when seeing on the cross section perpendicular to its bearing of trend described groove and when projection, the absolute value at the inclination angle that the described relatively bottom surface of tangent line of the intersection between the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms and described projection and the described groove adjacent with the cutter hub rear end side forms differs from one another.

18, throw-away tip as claimed in claim 17, it is characterized in that the absolute value at the inclination angle that the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms forms greater than the described relatively bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub rear end side.

19, throw-away tip as claimed in claim 11 is characterized in that, the intersection between described groove and the projection is made of the plane.

20, throw-away tip as claimed in claim 11, it is characterized in that, the described end face that links to each other with the fore-end of described cutting edge is made into to move closer to along with this cutting edge front end of trend the inclined-plane of described bottom surface, and described serration forms on the described end face except this inclined-plane.

21, a kind of throw-away tip, it is installed in and is forming in the crest line portion of the end face relative with the bottom surface that becomes seating surface on the cutter hub of a part that cutting edge and the rotary motion trace this cutting edge roughly be circular arc roughly is sphere, it is characterized in that, by a plurality of somes portions that form with described cutting edge on described end face crossingly, described cutting edge is made into by a plurality of grooves and the protruding waveform that constitutes.

22, throw-away tip as claimed in claim 21 is characterized in that, when described some portion is made of smooth curved surface, links to each other by smooth curved surface between these ones.

23, throw-away tip as claimed in claim 21, it is characterized in that, when on cross section, seeing described groove and when projection perpendicular to its bearing of trend, between the summit of described bottom land and described projection and the distance on this throw-away tip thickness direction be set to 0.3 millimeter-3.0 millimeters.

24, throw-away tip as claimed in claim 21 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, the distance between the described protruding summit is set to 1.0 millimeters-10.0 millimeters.

25, throw-away tip as claimed in claim 21 is characterized in that, when seeing described groove and projection on the cross section perpendicular to its bearing of trend, described groove and projection are made into its radius of curvature and are set to 1.0 millimeters-10.0 millimeters.

26, throw-away tip as claimed in claim 21, it is characterized in that, when seeing on the cross section perpendicular to its bearing of trend described groove and when projection, the absolute value at the inclination angle that the described relatively bottom surface of tangent line of the intersection between the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms and described projection and the described groove adjacent with the cutter hub rear end side forms differs from one another.

27, throw-away tip as claimed in claim 26, it is characterized in that the absolute value at the inclination angle that the absolute value at the inclination angle that the relative described bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub front forms forms greater than the described relatively bottom surface of tangent line of the intersection between described projection and the described groove adjacent with the cutter hub rear end side.

28, throw-away tip as claimed in claim 21 is characterized in that, the intersection between described groove and the projection is made of straight line.

29, throw-away tip as claimed in claim 21, it is characterized in that, the described end face that links to each other with the fore-end of described cutting edge is made into along with this cutting edge front end of trend gradually near the inclined-plane of described bottom surface, and described some portion forms on the described end face except this inclined-plane.

30, a kind of throw-away tip, it is installed in end face relative with the bottom surface that becomes seating surface and the crest line portion between the side and forms cutting edge and the rotary motion trace this cutting edge that roughly is circular arc and roughly be on the cutter hub of piece, it is characterized in that, alternately arrange the serration that forms by form a plurality of grooves and projection on described side, described cutting edge is made into waveform.

31, throw-away tip as claimed in claim 30 is characterized in that, described groove and projection are made of curved surface.

32, throw-away tip as claimed in claim 30, it is characterized in that, so form described serration, promptly when relatively seeing serration with described side, described groove is extending on the relative direction that tilts perpendicular to the direction of described end face with the absolute value below 10 ° with projection.

33, throw-away tip as claimed in claim 30 is characterized in that, described side is made into the multistage face shape that constitutes by a plurality of, wherein with side that described cutting edge links to each other on formed described serration.